Water quality indicator



FIG. 1 is a front elevational view of a water quality indicator;

FIG. 2 is a top plan view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a rear elevational view thereof; and,

FIG. 6 is a perspective view thereof showing use situation.

The dotted lines in the respective Figures do not constitute design elements in those embodiments. 

We claim an ornamental design for the water quality indicator, as shown and described. 